org.snf4j.core.codec.zip

Class GzipDecoder

java.lang.Object

org.snf4j.core.codec.zip.ZlibCodec

org.snf4j.core.codec.zip.ZlibDecoder

org.snf4j.core.codec.zip.GzipDecoder

All Implemented Interfaces:

ICodec<byte[],ByteBuffer>, IDecoder<byte[],ByteBuffer>, IEventDrivenCodec

public class GzipDecoder
extends ZlibDecoder

Decompresses an array of bytes using the gzip compression as specified in RFC 1952.

Author:

SNF4J.ORG

Nested Class Summary

Nested classes/interfaces inherited from class org.snf4j.core.codec.zip.ZlibCodec

ZlibCodec.Mode

Field Summary

Fields inherited from class org.snf4j.core.codec.zip.ZlibDecoder

inflater

Constructor Summary

Constructors

Constructor and Description
GzipDecoder() Creates a new gzip decoder.

Method Summary

Modifier and Type	Method and Description
protected boolean	postFinish(ISession session, ByteBuffer in) Parses the gzip footer.
protected void	postInflate(ISession session, byte[] data, int off, int len) Updates the CRC-32.
protected void	preInflate(ISession session, ByteBuffer in) Parses the gzip header.

Methods inherited from class org.snf4j.core.codec.zip.ZlibDecoder

added, decode, event, inflateBound, isFinished, removed

Methods inherited from class org.snf4j.core.codec.zip.ZlibCodec

getInboundType, getOutboundType

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.snf4j.core.codec.ICodec

getInboundType, getOutboundType

Constructor Detail

GzipDecoder

public GzipDecoder()

Creates a new gzip decoder.

Method Detail

preInflate

protected void preInflate(ISession session,
                          ByteBuffer in)
                   throws Exception

Parses the gzip header.

Overrides:

preInflate in class ZlibDecoder

Parameters:

session - the session object the decoder is associated with

in - the compressed input data

Throws:

Exception - if an error has occurred

postInflate

protected void postInflate(ISession session,
                           byte[] data,
                           int off,
                           int len)

Updates the CRC-32.

Overrides:

postInflate in class ZlibDecoder

Parameters:

session - the session object the decoder is associated with

data - an array with decompressed data

off - the start offset in the array at which the data should be read

len - the number of bytes to read

postFinish

protected boolean postFinish(ISession session,
                             ByteBuffer in)
                      throws Exception

Parses the gzip footer.

Overrides:

postFinish in class ZlibDecoder

Parameters:

session - the session object the decoder is associated with

in - the compressed input data

Returns:

true if all bytes forming the footer has been already consumed

Throws:

Exception - if an error has occurred